NDLI: Increased Polyamines Conjugated to Tonoplast Vesicles Correlate with Maintenance of the H+-ATPase and H+-PPase Activities and Enhanced Osmotic Stress Tolerance in Wheat

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Increased Polyamines Conjugated to Tonoplast Vesicles Correlate with Maintenance of the H+-ATPase and H+-PPase Activities and Enhanced Osmotic Stress Tolerance in Wheat

Journal of Plant Growth Regulation : Volume 23, Issue 1, March 2004

Journal of Plant Growth Regulation : Volume 22

Journal of Plant Growth Regulation : Volume 21

Journal of Plant Growth Regulation : Volume 20

Journal of Plant Growth Regulation : Volume 19

Journal of Plant Growth Regulation : Volume 18

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Journal of Plant Growth Regulation : Volume 16

Increased Polyamines Conjugated to Tonoplast Vesicles Correlate with Maintenance of the H+-ATPase and H+-PPase Activities and Enhanced Osmotic Stress Tolerance in Wheat

Content Provider	Springer Nature Link
Author	Liu, H. Liu, Y. Yu, B. Liu, Z. Zhang, W.
Copyright Year	2004
Abstract	The effects of osmotic stress on H+-ATPase and H+-PPase activities and the levels of covalently conjugated polyamines (CC-PAs) and noncovalently conjugated polyamines (NCC-PAs) were investigated using tonoplast vesicles isolated from the roots of wheat (Triticum aestivum L.) seedlings differing in drought-tolerance. The results showed that after polyethylene glycol (PEG) 6,000 (−0.55MPa) treatment for 7 days, seedling leaf relative water content (LRWC), relative dry weight increase rate (RDWIR) and root H+-ATPase and H+-PPase activities from the drought-sensitive cultivar Yangmai No. 9 decreased more markedly than those from the drought-tolerant cultivar Yumai No. 18. At the same time, the increase of the NCC-spermidine (NCC-Spd) and CC-putrescine (CC-Put) levels in root tonoplast vesicles from Yumai No. 18 was more obvious than that from Yangmai No. 9. Exogenous Spd treatment alleviated osmotic stress injury to Yangmai No. 9 seedlings, coupled with marked increases of tonoplast NCC-Spd levels and H+-ATPase and H+-PPase activities. Treatments with methylglyoxyl bis (guanyl hydrazone) (MGBG), an inhibitor of S-adenosylmethionine decarboxylase (SAMDC), and phenanthrolin, an inhibitor of transglutaminase (TGase), significantly inhibited the osmotically induced increases of NCC-Spd and CC-Put levels, respectively, in root tonoplast vesicles from Yumai No. 18 seedlings. Both MGBG and phenanthrolin treatments markedly promoted osmotically induced decreases of tonoplast H+-ATPase and H+-PPase activities and osmotic stress tolerance of seedlings of this cultivar. These results suggest that the NCC-Spd and CC-Put present in tonoplast vesicles isolated from wheat seedling roots might enhance the adaptation of seedlings to osmotic stress via maintenance of tonoplast H+-ATPase and H+-PPase activities.
Starting Page	156
Ending Page	165
Page Count	10
File Format	PDF
ISSN	07217595
Journal	Journal of Plant Growth Regulation
Volume Number	23
Issue Number	2
e-ISSN	14358107
Language	English
Publisher	Springer-Verlag
Publisher Date	2004-12-09
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Osmotic stress Polyamines Tonoplast H+-ATPase Tonoplast H+-PPase wheat (Triticum aestivum L.) Agriculture Cell Biology Forestry Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Plant Science Agronomy and Crop Science

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